Update Doctor Resource

app/Models/City.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class City extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'id',
+        'province_id',
+        'name'
+    ];
+
+    public function district()
+    {
+        return $this->hasMany(District::class, 'city_id');
+    }
+
+    public function province()
+    {
+        return $this->belongsTo(Province::class, 'province_id');
+    }
+}